Palaeoenvironmental Interpretation of Late Quaternary Marine Molluscan Assemblages, Canadian Arctic Archipelago
Palaeoenvironmental Interpretation of Late Quaternary Marine Molluscan Assemblages, Canadian Arctic Archipelago
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加拿大北极群岛晚第四纪海洋软体动物组合的古环境解释
DOI：
10.7202/005650ar
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
A. Aitken
中科院分区：
文献类型：
--
作者：
Sandra Gordillo;A. Aitken
本研究通过对北极海洋软体动物的新生物学和古生物学资料的分析，旨在重建晚第四纪北极海洋软体动物的古生态学。12-1 ka BP加拿大北极群岛的冰川海洋环境。从威尔士王子岛、萨默塞特岛、德文郡岛、阿克塞尔海伯格岛和埃尔斯米尔岛采集的贝壳标本中，共记录了26个分类群，代表15种双壳类和11种腹足类。尽管埋藏的偏见，所观察到的化石动物群具有很强的相似性，现代底栖软体动物区系栖息在高纬度大陆架环境，反映了高的保存潜力的软体动物类群在第四纪海洋沉积物。北极-北方动物区系以Hiatella arctica、Mya truncata和Astarte borealis为代表，其优势地位是高北极冰川海洋环境自然生态条件的产物。本文讨论了控制该地区晚第四纪软体动物组合分布和种类组成的环境因素。
This study examines neonto- logical and palaeontological data pertaining to arctic marine molluscs with the goal of reconstructing the palaeoecology of Late Quaternary ca. 12-1 ka BP glaciomarine environments in the Canadian Arctic Archipelago. A total of 26 taxa that represent 15 bivalves and 11 gastropods were recorded in shell collections recovered from Prince of Wales, Somerset, Devon, Axel Heiberg and Ellesmere islands. In spite of taphonomic bias, the observed fossil faunas bear strong similarities to modern benthic molluscan faunas inhabiting high latitude continental shelf environments, reflecting the high preservation potential of molluscan taxa in Quaternary marine sediments. The dominance of an arctic-boreal fauna represented by Hiatella arctica, Mya truncata and Astarte borealis is the product of natural ecological conditions in high arctic glaciomarine environments. Environmental factors controlling the distribution and species composition of the Late Quaternary molluscan assemblages from this region are discussed.